Hayward FDXLTER1930 FD Thermistor Replacement for Hayward Universal H-Series Low Nox Pool Heater sponge Fits F400 and F500 series

Fits F400 and F500 series as well as Fh66

Quick Latch mechanism makes it easy to drop down the respirator from face without removing head straps

The addition of Vapor Shield "military grade" anti-fog technology keeps these lenses completely resistant to fog

Fits hayward pro series sand filter models s180t

Specially engineered heat vents and expansion slots prevent blade distortion and increase blade life

Hayward FDXLTER1930 FD Thermistor Replacement for Hayward Universal H-Series Low Nox Pool Heater sponge Fits F400 and F500 seriesHayward FDXLTER1930 FD Thermistor Replacement for Hayward Universal H Series Low Nox Pool Heater Replacement fd thermistor Fits hayward universal h series low nox pool heater models h150fdn, h150fdp, h200fdn, h200fdp, h250fdn, h250fdp Also fits hayward universal h series low nox pool heater models h300fdn, h300fdp, h350fdn, h350fdp, h400fdn, h400fdp Weight 4 pounds